Features highlighted by PTM

Physical Change

Differences highlighted by PTM

Canvas 1

Strong impasto

Flattening (c.f. lining)

Flattened impasto, transferred canvas weave

Canvas 2

Strong impasto

Punctured

Large local distortion, crushed paint, cracking

Canvas 3

Low impasto, canvas weave

Scratched

Small local distortion, cracking

Canvas 4

Low impasto canvas weave

Overpainted

Texture of underpaint clearly visible

Canvas 5

Brushstrokes, canvas weave

Dropped

Planar distortion, slack canvas

Canvas 6

Brushstrokes

Climatic cycling*

No change seen

Panel 1

Strong impasto, brush and palette knife

Impact

Damaged impasto, dents, crack

Panel 2

Brushstrokes, wood grain

Climatic cycling*

Slight concaveness

Panel 3

Brushstrokes, wood grain

Snapped

Displacement,paint loss at fracture

Panel 4

Impasto, brush marks

Overpainted

Texture of underpaint clearly visible

* Temperature maintained at 25ºC while relative humidity cycled from 30 to 80 % every eight hours for one week.